Underwater Hotel
There are many tourists who like to stay at hotels that are underwarter. They may want to be able to see the underwater sealife such as fish or turtles. Some may want to see the coral or the beauty of underwater areas.
Some tourists may want a hotel that is cheap or luxury and has good access to parking facilities. They may want to be able to enter the hotel underwater perhaps by traveling via a underwater door. They may want to see the culture, entertainment, and tourist attractions of the area they go to. Some may want a cheap or expensive underwater hotel. Some may want a hotel that has good prices.
Underwater habitats are underwater structures in which people can live for extended periods and carry out most of the basic human functions of a 24-hour day, such as working, resting, eating, attending to personal hygiene, and sleeping.
In this context 'habitat' is generally used in a narrow sense to mean the interior and immediate exterior of the structure and its fixtures, but not its surrounding marine environment.
An underwater habitat has to meet the needs of human physiology and provide suitable environmental conditions, and the one which is most critical is breathing air of suitable quality. Others concern the physical environment (pressure, temperature, light, humidity), the chemical environment (drinking water, food, waste products, toxins) and the biological environment (hazardous sea creatures, microrganisms, fungi).
Much of the science covering underwater habitats and their technology designed to meet human requirements is shared with diving, diving bells, submersible vehicles and submarines, and spacecraft.
There have been numerous underwater habitats designed, built and used around the world since the early 1960s, either by private individuals or by government agencies. In that time they have been used almost exclusively for research and exploration, but in recent years at least one underwater habitat has been provided for recreation and tourism. Research has been devoted particularly to the physiological processes and limits of breathing gases under pressure, for aquanaut and astronaut training, as well as for research on marine ecosystems.
Underwater habitats are designed to operate in two fundamental modes.
One: habitats open to ambient pressure via a moon pool, meaning that the air pressure
inside the habitat equals underwater pressure at the same level, such as SEALAB,
and which makes entry and exit easy as there is no physical barrier other than
the moon pool water surface.
* Two: underwater habitats closed to the sea
by hatches, with internal air pressure less than ambient pressure and at or closer
to atmospheric pressure; entry or exit to the sea requires passing through hatches
and an airlock.
A third type of habitat can be made by having compartments of both types within the same habitat structure and connected via airlocks, such as Aquarius (laboratory).
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